The Question is from neet-botany biological-classification , and it was created by the author K SURESH KUMAR

Question

Which animal phylum is characterized by a segmented body, jointed appendages, and an exoskeleton?

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Animal Phyla Classification
 **Related Topics**: Invertebrate anatomy, exoskeleton, segmentation, jointed appendages
 **Prerequisites**: Basic understanding of animal phyla and their characteristics.
## SOLUTION PATHWAY
**Given Information**:
  The question describes an animal with three key features: segmented body, jointed appendages, and an exoskeleton.
  We need to identify the phylum possessing these characteristics.
**Method & Steps**:
 1. Analyze the given characteristics:
  Reasoning: We need to match the given characteristics with the defining features of different animal phyla.
  Formula/Rule: None directly applicable, this is a classification problem.
 2. Compare with known phyla:
  Working: Let's examine the options:
  * Mollusca:  Mollusks have soft bodies, often with a shell, but lack segmented bodies and jointed appendages.
  * Echinodermata: Echinoderms (like starfish) have radial symmetry, a water vascular system, and lack jointed appendages and a true exoskeleton.
  * Arthropoda: Arthropods (insects, crustaceans, arachnids) are characterized by segmented bodies, jointed appendages, and an exoskeleton.
  * Chordata: Chordates (vertebrates and some invertebrates) have a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail. They don't typically have an exoskeleton.
 3. Identify the correct phylum:
  Result: The phylum Arthropoda perfectly matches the given description.
  Verification:  The defining features of Arthropoda – segmented body, jointed appendages, and exoskeleton – align precisely with the question's description.
 ## OPTION ANALYSIS
A :x: Mollusca lack segmented bodies and jointed appendages.
B :x: Echinodermata lack jointed appendages and a true exoskeleton.
C ✓: Arthropoda perfectly fits the description with segmented bodies, jointed appendages, and an exoskeleton.
D :x: Chordata lack exoskeletons and don't typically exhibit the described segmentation and appendages.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing Arthropods with other phyla due to superficial similarities: Carefully examine the defining characteristics of each phylum.
  2.Overlooking the importance of the exoskeleton: The exoskeleton is a crucial defining feature of arthropods.
 **Quick Tips**:
  1.Memorize the key characteristics of each major animal phylum.
  2.Create flashcards with the phyla and their defining features to aid memorization.

K SURESH KUMAR · Answer

Mollusca

K SURESH KUMAR · Answer

Echinodermata

K SURESH KUMAR · Answer

The correct Option is "Arthropoda"

K SURESH KUMAR · Answer

Chordata

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